LAUSR

ABSTRACT Objective: Long‑term color stability of esthetic restoration considered a vital property. Our study was aimed to evaluate the color stability of composite restorative materials after surface sealant application. Materials and Methods: Two brands of composite resin material used which include G-aenial Posterior (GC,USA) and Ceram.x SphereTEC one (Densply, USA). Fourty eight composite specimen were prepared by using metal rings (10 mm in diameter, 2 mm in thickness). Finishing of all samples were done with Enhance (Rubber Point,Dentsply Caulk, Milford,DE, USA) . The samples of the tested composite were randomly divided into three groups , one of these groups were etched for 20 seconds by Ultra-Etch phos¬phoric acid 35% (USA), washing with water for 20 seconds was done, then dried by absorbent paper and of air. Apply a thin coat of PermaSeal (Ultradent, USA) on the external surface of the sam¬ples for 5 seconds using a Microbrush (Ultradent, USA), then gently air thinned and cured for 20 seconds. All samples except control immersed in 5 mL black tea (Lipton, Unilever, Istanbul, Turkey) for 15 minute daily for 14 day. Results: Color changes (ΔE) in the whole tested groups was higher than 3.3 , which means that immersion of composite samples in tea causes a clinically unacceptable color change when compared to control. The highest color change (ΔE) was observed with ceram.x SphereTEC one composite after immersion in tea with or without PermaSeal application. Conclusions: Addition of surface sealant was not provide stain resistance for composite.